[PATCH RFC v2 05/10] vringh: add vringh_kiov_length() helper
From: Stefano Garzarella <sgarzare@redhat.com>
Date: 2021-01-28 14:48:08
Also in:
kvm, lkml
Subsystem:
the rest, virtio core · Maintainers:
Linus Torvalds, "Michael S. Tsirkin", Jason Wang
This new helper returns the total number of bytes covered by a vringh_kiov. Suggested-by: Jason Wang <redacted> Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> --- include/linux/vringh.h | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/include/linux/vringh.h b/include/linux/vringh.h
index 755211ebd195..84db7b8f912f 100644
--- a/include/linux/vringh.h
+++ b/include/linux/vringh.h@@ -199,6 +199,17 @@ static inline void vringh_kiov_cleanup(struct vringh_kiov *kiov) kiov->iov = NULL; } +static inline size_t vringh_kiov_length(struct vringh_kiov *kiov) +{ + size_t len = 0; + int i; + + for (i = kiov->i; i < kiov->used; i++) + len += kiov->iov[i].iov_len; + + return len; +} + void vringh_kiov_advance(struct vringh_kiov *kiov, size_t len); int vringh_getdesc_kern(struct vringh *vrh,
--
2.29.2
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